packedFile.cc

Go to the documentation of this file.

/* SPDX-FileCopyrightText: 2001-2002 NaN Holding BV. All rights reserved.
 *
 * SPDX-License-Identifier: GPL-2.0-or-later */

 
#include <algorithm>
#include <cstdio>
#include <fcntl.h>
#include <sys/stat.h>
 
#ifndef WIN32
#  include <unistd.h>
#else
#  include <io.h>
#endif
#include "MEM_guardedalloc.h"
#include <cstring>
 
#include "AS_essentials_library.hh"
 
#include "DNA_ID.h"
#include "DNA_image_types.h"
#include "DNA_modifier_types.h"
#include "DNA_packedFile_types.h"
#include "DNA_sound_types.h"
#include "DNA_vfont_types.h"
#include "DNA_volume_types.h"
 
#include "BLI_listbase.h"
#include "BLI_path_utils.hh"
#include "BLI_string.h"
#include "BLI_utildefines.h"
 
#include "BKE_bake_geometry_nodes_modifier.hh"
#include "BKE_bake_geometry_nodes_modifier_pack.hh"
#include "BKE_image.hh"
#include "BKE_image_format.hh"
#include "BKE_library.hh"
#include "BKE_main.hh"
#include "BKE_packedFile.hh"
#include "BKE_report.hh"
#include "BKE_sound.h"
#include "BKE_vfont.hh"
#include "BKE_volume.hh"
 
#include "DEG_depsgraph.hh"
 
#include "IMB_imbuf.hh"
 
#include "BLO_read_write.hh"
 
#include "CLG_log.h"
 
static CLG_LogRef LOG = {"lib.packedfile"};
 
using namespace blender;
 
int BKE_packedfile_seek(PackedFile *pf, int offset, int whence)
{
  int oldseek = -1, seek = 0;
 
  if (pf) {
    oldseek = pf->seek;
    switch (whence) {
      case SEEK_CUR:
        seek = oldseek + offset;
        break;
      case SEEK_END:
        seek = pf->size + offset;
        break;
      case SEEK_SET:
        seek = offset;
        break;
      default:
        oldseek = -1;
        break;
    }
    if (seek < 0) {
      seek = 0;
    }
    else if (seek > pf->size) {
      seek = pf->size;
    }
    pf->seek = seek;
  }
 
  return oldseek;
}
 
void BKE_packedfile_rewind(PackedFile *pf)
{
  BKE_packedfile_seek(pf, 0, SEEK_SET);
}
 
int BKE_packedfile_read(PackedFile *pf, void *data, int size)
{
  if ((pf != nullptr) && (size >= 0) && (data != nullptr)) {
    if (size + pf->seek > pf->size) {
      size = pf->size - pf->seek;
    }
 
    if (size > 0) {
      memcpy(data, ((const char *)pf->data) + pf->seek, size);
    }
    else {
      size = 0;
    }
 
    pf->seek += size;
  }
  else {
    size = -1;
  }
 
  return size;
}
 
PackedFileCount BKE_packedfile_count_all(Main *bmain)
{
  Image *ima;
  VFont *vf;
  bSound *sound;
  Volume *volume;
 
  PackedFileCount count;
 
  /* let's check if there are packed files... */
  for (ima = static_cast<Image *>(bmain->images.first); ima;
       ima = static_cast<Image *>(ima->id.next))
  {
    if (BKE_image_has_packedfile(ima) && !ID_IS_LINKED(ima)) {
      count.individual_files++;
    }
  }
 
  for (vf = static_cast<VFont *>(bmain->fonts.first); vf; vf = static_cast<VFont *>(vf->id.next)) {
    if (vf->packedfile && !ID_IS_LINKED(vf)) {
      count.individual_files++;
    }
  }
 
  for (sound = static_cast<bSound *>(bmain->sounds.first); sound;
       sound = static_cast<bSound *>(sound->id.next))
  {
    if (sound->packedfile && !ID_IS_LINKED(sound)) {
      count.individual_files++;
    }
  }
 
  for (volume = static_cast<Volume *>(bmain->volumes.first); volume;
       volume = static_cast<Volume *>(volume->id.next))
  {
    if (volume->packedfile && !ID_IS_LINKED(volume)) {
      count.individual_files++;
    }
  }
 
  LISTBASE_FOREACH (Object *, object, &bmain->objects) {
    if (ID_IS_LINKED(object)) {
      continue;
    }
    LISTBASE_FOREACH (ModifierData *, md, &object->modifiers) {
      if (md->type == eModifierType_Nodes) {
        NodesModifierData *nmd = reinterpret_cast<NodesModifierData *>(md);
        for (const NodesModifierBake &bake : blender::Span{nmd->bakes, nmd->bakes_num}) {
          if (bake.packed) {
            count.bakes++;
          }
        }
      }
    }
  }
 
  return count;
}
 
void BKE_packedfile_free(PackedFile *pf)
{
  if (pf) {
    BLI_assert(pf->data != nullptr);
    BLI_assert(pf->sharing_info != nullptr);
 
    pf->sharing_info->remove_user_and_delete_if_last();
    MEM_freeN(pf);
  }
  else {
    printf("%s: Trying to free a nullptr pointer\n", __func__);
  }
}
 
PackedFile *BKE_packedfile_duplicate(const PackedFile *pf_src)
{
  BLI_assert(pf_src != nullptr);
  BLI_assert(pf_src->data != nullptr);
 
  PackedFile *pf_dst;
 
  pf_dst = static_cast<PackedFile *>(MEM_dupallocN(pf_src));
  pf_dst->sharing_info->add_user();
 
  return pf_dst;
}
 
PackedFile *BKE_packedfile_new_from_memory(const void *mem,
                                           int memlen,
                                           const blender::ImplicitSharingInfo *sharing_info)
{
  BLI_assert(mem != nullptr);
  if (!sharing_info) {
    /* Assume we are the only owner of that memory currently. */
    sharing_info = blender::implicit_sharing::info_for_mem_free(const_cast<void *>(mem));
  }
 
  PackedFile *pf = MEM_callocN<PackedFile>("PackedFile");
  pf->data = mem;
  pf->size = memlen;
  pf->sharing_info = sharing_info;
 
  return pf;
}
 
PackedFile *BKE_packedfile_new(ReportList *reports, const char *filepath_rel, const char *basepath)
{
  char filepath[FILE_MAX];
 
  /* render result has no filepath and can be ignored
   * any other files with no name can be ignored too */
  if (filepath_rel[0] == '\0') {
    return nullptr;
  }
 
  // XXX waitcursor(1);
 
  /* convert relative filenames to absolute filenames */
 
  STRNCPY(filepath, filepath_rel);
  BLI_path_abs(filepath, basepath);
 
  /* open the file
   * and create a PackedFile structure */
 
  const int file = BLI_open(filepath, O_BINARY | O_RDONLY, 0);
  if (file == -1) {
    BKE_reportf(reports, RPT_ERROR, "Unable to pack file, source path '%s' not found", filepath);
    return nullptr;
  }
 
  PackedFile *pf = nullptr;
  const size_t file_size = BLI_file_descriptor_size(file);
  if (file_size == size_t(-1)) {
    BKE_reportf(reports, RPT_ERROR, "Unable to access the size of, source path '%s'", filepath);
  }
  else if (file_size > PACKED_FILE_MAX_SIZE) {
    BKE_reportf(reports, RPT_ERROR, "Unable to pack files over 2gb, source path '%s'", filepath);
  }
  else {
    /* #MEM_mallocN complains about `MEM_mallocN(0, "...")`,
     * a single allocation is harmless and doesn't cause any complications. */
    void *data = MEM_mallocN(std::max(file_size, size_t(1)), "packFile");
    if (BLI_read(file, data, file_size) == file_size) {
      pf = BKE_packedfile_new_from_memory(data, file_size);
    }
    else {
      MEM_freeN(data);
    }
  }
 
  close(file);
 
  // XXX waitcursor(0);
 
  return pf;
}
 
void BKE_packedfile_pack_all(Main *bmain, ReportList *reports, bool verbose)
{
  Image *ima;
  VFont *vfont;
  bSound *sound;
  Volume *volume;
  int tot = 0;
 
  for (ima = static_cast<Image *>(bmain->images.first); ima;
       ima = static_cast<Image *>(ima->id.next))
  {
    if (BKE_image_has_packedfile(ima) == false && ID_IS_EDITABLE(ima)) {
      if (ELEM(ima->source, IMA_SRC_FILE, IMA_SRC_TILED)) {
        BKE_image_packfiles(reports, ima, ID_BLEND_PATH(bmain, &ima->id));
        tot++;
      }
      else if (ELEM(ima->source, IMA_SRC_MOVIE, IMA_SRC_SEQUENCE) && verbose) {
        BKE_reportf(reports,
                    RPT_WARNING,
                    "Image '%s' skipped, packing movies or image sequences not supported",
                    ima->id.name + 2);
      }
    }
  }
 
  for (vfont = static_cast<VFont *>(bmain->fonts.first); vfont;
       vfont = static_cast<VFont *>(vfont->id.next))
  {
    if (vfont->packedfile == nullptr && ID_IS_EDITABLE(vfont) &&
        BKE_vfont_is_builtin(vfont) == false)
    {
      vfont->packedfile = BKE_packedfile_new(
          reports, vfont->filepath, BKE_main_blendfile_path(bmain));
      tot++;
    }
  }
 
  for (sound = static_cast<bSound *>(bmain->sounds.first); sound;
       sound = static_cast<bSound *>(sound->id.next))
  {
    if (sound->packedfile == nullptr && ID_IS_EDITABLE(sound)) {
      sound->packedfile = BKE_packedfile_new(
          reports, sound->filepath, BKE_main_blendfile_path(bmain));
      tot++;
    }
  }
 
  for (volume = static_cast<Volume *>(bmain->volumes.first); volume;
       volume = static_cast<Volume *>(volume->id.next))
  {
    if (volume->packedfile == nullptr && ID_IS_EDITABLE(volume)) {
      volume->packedfile = BKE_packedfile_new(
          reports, volume->filepath, BKE_main_blendfile_path(bmain));
      tot++;
    }
  }
 
  LISTBASE_FOREACH (Object *, object, &bmain->objects) {
    if (ID_IS_LINKED(object)) {
      continue;
    }
    LISTBASE_FOREACH (ModifierData *, md, &object->modifiers) {
      if (md->type == eModifierType_Nodes) {
        NodesModifierData *nmd = reinterpret_cast<NodesModifierData *>(md);
        for (NodesModifierBake &bake : blender::MutableSpan{nmd->bakes, nmd->bakes_num}) {
          blender::bke::bake::pack_geometry_nodes_bake(*bmain, reports, *object, *nmd, bake);
        }
      }
    }
  }
 
  if (tot > 0) {
    BKE_reportf(reports, RPT_INFO, "Packed %d file(s)", tot);
  }
  else if (verbose) {
    BKE_report(reports, RPT_INFO, "No new files have been packed");
  }
}
 
int BKE_packedfile_write_to_file(ReportList *reports,
                                 const char *ref_file_name,
                                 const char *filepath_rel,
                                 PackedFile *pf)
{
  int file, number;
  int ret_value = RET_OK;
  bool remove_tmp = false;
  char filepath[FILE_MAX];
  char filepath_temp[FILE_MAX];
  // void *data;
 
  STRNCPY(filepath, filepath_rel);
  BLI_path_abs(filepath, ref_file_name);
 
  if (BLI_exists(filepath)) {
    for (number = 1; number <= 999; number++) {
      SNPRINTF(filepath_temp, "%s.%03d_", filepath, number);
      if (!BLI_exists(filepath_temp)) {
        if (BLI_copy(filepath, filepath_temp) == RET_OK) {
          remove_tmp = true;
        }
        break;
      }
    }
  }
 
  BLI_file_ensure_parent_dir_exists(filepath);
 
  file = BLI_open(filepath, O_BINARY + O_WRONLY + O_CREAT + O_TRUNC, 0666);
  if (file == -1) {
    BKE_reportf(reports, RPT_ERROR, "Error creating file '%s'", filepath);
    ret_value = RET_ERROR;
  }
  else {
    if (write(file, pf->data, pf->size) != pf->size) {
      BKE_reportf(reports, RPT_ERROR, "Error writing file '%s'", filepath);
      ret_value = RET_ERROR;
    }
    else {
      BKE_reportf(reports, RPT_INFO, "Saved packed file to: %s", filepath);
    }
 
    close(file);
  }
 
  if (remove_tmp) {
    if (ret_value == RET_ERROR) {
      if (BLI_rename_overwrite(filepath_temp, filepath) != 0) {
        BKE_reportf(reports,
                    RPT_ERROR,
                    "Error restoring temp file (check files '%s' '%s')",
                    filepath_temp,
                    filepath);
      }
    }
    else {
      if (BLI_delete(filepath_temp, false, false) != 0) {
        BKE_reportf(reports, RPT_ERROR, "Error deleting '%s' (ignored)", filepath_temp);
      }
    }
  }
 
  return ret_value;
}
 
enum ePF_FileCompare BKE_packedfile_compare_to_file(const char *ref_file_name,
                                                    const char *filepath_rel,
                                                    const PackedFile *pf)
{
  BLI_stat_t st;
  enum ePF_FileCompare ret_val;
  char buf[4096];
  char filepath[FILE_MAX];
 
  STRNCPY(filepath, filepath_rel);
  BLI_path_abs(filepath, ref_file_name);
 
  if (BLI_stat(filepath, &st) == -1) {
    ret_val = PF_CMP_NOFILE;
  }
  else if (st.st_size != pf->size) {
    ret_val = PF_CMP_DIFFERS;
  }
  else {
    /* we'll have to compare the two... */
 
    const int file = BLI_open(filepath, O_BINARY | O_RDONLY, 0);
    if (file == -1) {
      ret_val = PF_CMP_NOFILE;
    }
    else {
      ret_val = PF_CMP_EQUAL;
 
      for (int i = 0; i < pf->size; i += sizeof(buf)) {
        int len = pf->size - i;
        len = std::min<ulong>(len, sizeof(buf));
 
        if (BLI_read(file, buf, len) != len) {
          /* read error ... */
          ret_val = PF_CMP_DIFFERS;
          break;
        }
 
        if (memcmp(buf, ((const char *)pf->data) + i, len) != 0) {
          ret_val = PF_CMP_DIFFERS;
          break;
        }
      }
 
      close(file);
    }
  }
 
  return ret_val;
}
 
char *BKE_packedfile_unpack_to_file(ReportList *reports,
                                    const char *ref_file_name,
                                    const char *abs_name,
                                    const char *local_name,
                                    PackedFile *pf,
                                    enum ePF_FileStatus how)
{
  char *newname = nullptr;
  const char *temp = nullptr;
 
  if (pf != nullptr) {
    switch (how) {
      case PF_KEEP:
        break;
      case PF_REMOVE:
        temp = abs_name;
        break;
      case PF_USE_LOCAL: {
        char temp_abs[FILE_MAX];
 
        STRNCPY(temp_abs, local_name);
        BLI_path_abs(temp_abs, ref_file_name);
 
        /* if file exists use it */
        if (BLI_exists(temp_abs)) {
          temp = local_name;
          break;
        }
        /* else create it */
        ATTR_FALLTHROUGH;
      }
      case PF_WRITE_LOCAL:
        if (BKE_packedfile_write_to_file(reports, ref_file_name, local_name, pf) == RET_OK) {
          temp = local_name;
        }
        break;
      case PF_USE_ORIGINAL: {
        char temp_abs[FILE_MAX];
 
        STRNCPY(temp_abs, abs_name);
        BLI_path_abs(temp_abs, ref_file_name);
 
        /* if file exists use it */
        if (BLI_exists(temp_abs)) {
          BKE_reportf(reports, RPT_INFO, "Use existing file (instead of packed): %s", abs_name);
          temp = abs_name;
          break;
        }
        /* else create it */
        ATTR_FALLTHROUGH;
      }
      case PF_WRITE_ORIGINAL:
        if (BKE_packedfile_write_to_file(reports, ref_file_name, abs_name, pf) == RET_OK) {
          temp = abs_name;
        }
        break;
      default:
        printf("%s: unknown return_value %d\n", __func__, how);
        break;
    }
 
    if (temp) {
      newname = BLI_strdup(temp);
    }
  }
 
  return newname;
}
 
static void unpack_generate_paths(const char *filepath,
                                  ID *id,
                                  char *r_abspath,
                                  size_t abspath_maxncpy,
                                  char *r_relpath,
                                  size_t relpath_maxncpy)
{
  const short id_type = GS(id->name);
  char temp_filename[FILE_MAX];
  char temp_dirname[FILE_MAXDIR];
 
  BLI_path_split_dir_file(
      filepath, temp_dirname, sizeof(temp_dirname), temp_filename, sizeof(temp_filename));
 
  if (temp_filename[0] == '\0') {
    /* NOTE: we generally do not have any real way to re-create extension out of data. */
    const size_t len = STRNCPY_RLEN(temp_filename, id->name + 2);
    printf("%s\n", temp_filename);
 
    /* For images ensure that the temporary filename contains tile number information as well as
     * a file extension based on the file magic. */
    if (id_type == ID_IM) {
      Image *ima = (Image *)id;
      ImagePackedFile *imapf = static_cast<ImagePackedFile *>(ima->packedfiles.last);
      if (imapf != nullptr && imapf->packedfile != nullptr) {
        const PackedFile *pf = imapf->packedfile;
        enum eImbFileType ftype = eImbFileType(
            IMB_test_image_type_from_memory((const uchar *)pf->data, pf->size));
        if (ima->source == IMA_SRC_TILED) {
          char tile_number[6];
          SNPRINTF(tile_number, ".%d", imapf->tile_number);
          BLI_strncpy(temp_filename + len, tile_number, sizeof(temp_filename) - len);
        }
        if (ftype != IMB_FTYPE_NONE) {
          const int imtype = BKE_ftype_to_imtype(ftype, nullptr);
          BKE_image_path_ext_from_imtype_ensure(temp_filename, sizeof(temp_filename), imtype);
        }
      }
    }
 
    BLI_path_make_safe_filename(temp_filename);
    printf("%s\n", temp_filename);
  }
 
  if (temp_dirname[0] == '\0') {
    /* Fall back to relative dir. */
    STRNCPY(temp_dirname, "//");
  }
 
  {
    const char *dir_name = nullptr;
    switch (id_type) {
      case ID_VF:
        dir_name = "fonts";
        break;
      case ID_SO:
        dir_name = "sounds";
        break;
      case ID_IM:
        dir_name = "textures";
        break;
      case ID_VO:
        dir_name = "volumes";
        break;
      default:
        break;
    }
    if (dir_name) {
      BLI_path_join(r_relpath, relpath_maxncpy, "//", dir_name, temp_filename);
    }
  }
 
  {
    size_t len = BLI_strncpy_rlen(r_abspath, temp_dirname, abspath_maxncpy);
    BLI_strncpy(r_abspath + len, temp_filename, abspath_maxncpy - len);
  }
}
 
char *BKE_packedfile_unpack(Main *bmain,
                            ReportList *reports,
                            ID *id,
                            const char *orig_file_path,
                            PackedFile *pf,
                            enum ePF_FileStatus how)
{
  char localname[FILE_MAX], absname[FILE_MAX];
  char *new_name = nullptr;
 
  if (id != nullptr) {
    unpack_generate_paths(
        orig_file_path, id, absname, sizeof(absname), localname, sizeof(localname));
    new_name = BKE_packedfile_unpack_to_file(
        reports, BKE_main_blendfile_path(bmain), absname, localname, pf, how);
  }
 
  return new_name;
}
 
int BKE_packedfile_unpack_vfont(Main *bmain,
                                ReportList *reports,
                                VFont *vfont,
                                enum ePF_FileStatus how)
{
  int ret_value = RET_ERROR;
  if (vfont) {
    char *new_file_path = BKE_packedfile_unpack(
        bmain, reports, (ID *)vfont, vfont->filepath, vfont->packedfile, how);
 
    if (new_file_path != nullptr) {
      ret_value = RET_OK;
      BKE_packedfile_free(vfont->packedfile);
      vfont->packedfile = nullptr;
      STRNCPY(vfont->filepath, new_file_path);
      MEM_freeN(new_file_path);
    }
  }
 
  return ret_value;
}
 
int BKE_packedfile_unpack_sound(Main *bmain,
                                ReportList *reports,
                                bSound *sound,
                                enum ePF_FileStatus how)
{
  int ret_value = RET_ERROR;
 
  if (sound != nullptr) {
    char *new_file_path = BKE_packedfile_unpack(
        bmain, reports, (ID *)sound, sound->filepath, sound->packedfile, how);
    if (new_file_path != nullptr) {
      STRNCPY(sound->filepath, new_file_path);
      MEM_freeN(new_file_path);
 
      BKE_packedfile_free(sound->packedfile);
      sound->packedfile = nullptr;
 
      BKE_sound_load(bmain, sound);
 
      ret_value = RET_OK;
    }
  }
 
  return ret_value;
}
 
int BKE_packedfile_unpack_image(Main *bmain,
                                ReportList *reports,
                                Image *ima,
                                enum ePF_FileStatus how)
{
  int ret_value = RET_ERROR;
 
  if (ima != nullptr) {
    while (ima->packedfiles.last) {
      ImagePackedFile *imapf = static_cast<ImagePackedFile *>(ima->packedfiles.last);
      char *new_file_path = BKE_packedfile_unpack(
          bmain, reports, (ID *)ima, imapf->filepath, imapf->packedfile, how);
 
      if (new_file_path != nullptr) {
        ImageView *iv;
 
        ret_value = ret_value == RET_ERROR ? RET_ERROR : RET_OK;
        BKE_packedfile_free(imapf->packedfile);
        imapf->packedfile = nullptr;
 
        /* update the new corresponding view filepath */
        iv = static_cast<ImageView *>(
            BLI_findstring(&ima->views, imapf->filepath, offsetof(ImageView, filepath)));
        if (iv) {
          STRNCPY(iv->filepath, new_file_path);
        }
 
        /* keep the new name in the image for non-pack specific reasons */
        if (how != PF_REMOVE) {
          STRNCPY(ima->filepath, new_file_path);
          if (ima->source == IMA_SRC_TILED) {
            /* Ensure that the Image filepath is kept in a tokenized format. */
            BKE_image_ensure_tile_token(ima->filepath, sizeof(ima->filepath));
          }
        }
        MEM_freeN(new_file_path);
      }
      else {
        ret_value = RET_ERROR;
      }
 
      BLI_remlink(&ima->packedfiles, imapf);
      MEM_freeN(imapf);
    }
  }
 
  if (ret_value == RET_OK) {
    BKE_image_signal(bmain, ima, nullptr, IMA_SIGNAL_RELOAD);
  }
 
  return ret_value;
}
 
int BKE_packedfile_unpack_volume(Main *bmain,
                                 ReportList *reports,
                                 Volume *volume,
                                 enum ePF_FileStatus how)
{
  int ret_value = RET_ERROR;
 
  if (volume != nullptr) {
    char *new_file_path = BKE_packedfile_unpack(
        bmain, reports, (ID *)volume, volume->filepath, volume->packedfile, how);
    if (new_file_path != nullptr) {
      STRNCPY(volume->filepath, new_file_path);
      MEM_freeN(new_file_path);
 
      BKE_packedfile_free(volume->packedfile);
      volume->packedfile = nullptr;
 
      BKE_volume_unload(volume);
 
      ret_value = RET_OK;
    }
  }
 
  return ret_value;
}
 
int BKE_packedfile_unpack_all_libraries(Main *bmain, ReportList *reports)
{
  Library *lib;
  char *newname;
  int ret_value = RET_ERROR;
 
  for (lib = static_cast<Library *>(bmain->libraries.first); lib;
       lib = static_cast<Library *>(lib->id.next))
  {
    if (lib->packedfile && lib->filepath[0]) {
 
      newname = BKE_packedfile_unpack_to_file(reports,
                                              BKE_main_blendfile_path(bmain),
                                              lib->runtime->filepath_abs,
                                              lib->runtime->filepath_abs,
                                              lib->packedfile,
                                              PF_WRITE_ORIGINAL);
      if (newname != nullptr) {
        ret_value = RET_OK;
 
        printf("Unpacked .blend library: %s\n", newname);
 
        BKE_packedfile_free(lib->packedfile);
        lib->packedfile = nullptr;
 
        MEM_freeN(newname);
      }
    }
  }
 
  return ret_value;
}
 
void BKE_packedfile_pack_all_libraries(Main *bmain, ReportList *reports)
{
  Library *lib;
 
  /* Only allow libraries with relative paths (to avoid issues when unpacking, a limitation that we
   * might want to lift since the "relativeness" does not really ensure sanity significantly more).
   */
  for (lib = static_cast<Library *>(bmain->libraries.first); lib;
       lib = static_cast<Library *>(lib->id.next))
  {
    /* Exception to the above: essential assets have an absolute path and should not prevent to
     * operator from continuing. */
    if (BLI_path_contains(blender::asset_system::essentials_directory_path().c_str(),
                          lib->filepath))
    {
      continue;
    }
 
    if (!BLI_path_is_rel(lib->filepath)) {
      break;
    }
  }
 
  if (lib) {
    BKE_reportf(reports, RPT_ERROR, "Cannot pack absolute file: '%s'", lib->filepath);
    return;
  }
 
  for (lib = static_cast<Library *>(bmain->libraries.first); lib;
       lib = static_cast<Library *>(lib->id.next))
  {
    /* Do not really pack essential assets though (see above). */
    if (BLI_path_contains(blender::asset_system::essentials_directory_path().c_str(),
                          lib->filepath))
    {
      continue;
    }
    if (lib->packedfile == nullptr) {
      lib->packedfile = BKE_packedfile_new(reports, lib->filepath, BKE_main_blendfile_path(bmain));
    }
  }
}
 
void BKE_packedfile_unpack_all(Main *bmain, ReportList *reports, enum ePF_FileStatus how)
{
  Image *ima;
  VFont *vf;
  bSound *sound;
  Volume *volume;
 
  for (ima = static_cast<Image *>(bmain->images.first); ima;
       ima = static_cast<Image *>(ima->id.next))
  {
    if (BKE_image_has_packedfile(ima) && !ID_IS_LINKED(ima)) {
      BKE_packedfile_unpack_image(bmain, reports, ima, how);
    }
  }
 
  for (vf = static_cast<VFont *>(bmain->fonts.first); vf; vf = static_cast<VFont *>(vf->id.next)) {
    if (vf->packedfile && !ID_IS_LINKED(vf)) {
      BKE_packedfile_unpack_vfont(bmain, reports, vf, how);
    }
  }
 
  for (sound = static_cast<bSound *>(bmain->sounds.first); sound;
       sound = static_cast<bSound *>(sound->id.next))
  {
    if (sound->packedfile && !ID_IS_LINKED(sound)) {
      BKE_packedfile_unpack_sound(bmain, reports, sound, how);
    }
  }
 
  for (volume = static_cast<Volume *>(bmain->volumes.first); volume;
       volume = static_cast<Volume *>(volume->id.next))
  {
    if (volume->packedfile && !ID_IS_LINKED(volume)) {
      BKE_packedfile_unpack_volume(bmain, reports, volume, how);
    }
  }
 
  LISTBASE_FOREACH (Object *, object, &bmain->objects) {
    if (ID_IS_LINKED(object)) {
      continue;
    }
    LISTBASE_FOREACH (ModifierData *, md, &object->modifiers) {
      if (md->type == eModifierType_Nodes) {
        NodesModifierData *nmd = reinterpret_cast<NodesModifierData *>(md);
        for (NodesModifierBake &bake : blender::MutableSpan{nmd->bakes, nmd->bakes_num}) {
          blender::bke::bake::unpack_geometry_nodes_bake(
              *bmain, reports, *object, *nmd, bake, how);
        }
      }
    }
  }
}
 
bool BKE_packedfile_id_check(const ID *id)
{
  switch (GS(id->name)) {
    case ID_IM: {
      const Image *ima = (const Image *)id;
      return BKE_image_has_packedfile(ima);
    }
    case ID_VF: {
      const VFont *vf = (const VFont *)id;
      return vf->packedfile != nullptr;
    }
    case ID_SO: {
      const bSound *snd = (const bSound *)id;
      return snd->packedfile != nullptr;
    }
    case ID_VO: {
      const Volume *volume = (const Volume *)id;
      return volume->packedfile != nullptr;
    }
    case ID_LI: {
      const Library *li = (const Library *)id;
      return li->packedfile != nullptr;
    }
    default:
      break;
  }
  return false;
}
 
void BKE_packedfile_id_unpack(Main *bmain, ID *id, ReportList *reports, enum ePF_FileStatus how)
{
  /* Only unpack when datablock is editable. */
  if (!ID_IS_EDITABLE(id)) {
    return;
  }
 
  switch (GS(id->name)) {
    case ID_IM: {
      Image *ima = (Image *)id;
      if (BKE_image_has_packedfile(ima)) {
        BKE_packedfile_unpack_image(bmain, reports, ima, how);
      }
      break;
    }
    case ID_VF: {
      VFont *vf = (VFont *)id;
      if (vf->packedfile) {
        BKE_packedfile_unpack_vfont(bmain, reports, vf, how);
      }
      break;
    }
    case ID_SO: {
      bSound *snd = (bSound *)id;
      if (snd->packedfile) {
        BKE_packedfile_unpack_sound(bmain, reports, snd, how);
      }
      break;
    }
    case ID_VO: {
      Volume *volume = (Volume *)id;
      if (volume->packedfile) {
        BKE_packedfile_unpack_volume(bmain, reports, volume, how);
      }
      break;
    }
    case ID_LI: {
      Library *li = (Library *)id;
      BKE_reportf(reports, RPT_ERROR, "Cannot unpack individual Library file, '%s'", li->filepath);
      break;
    }
    default:
      break;
  }
}
 
void BKE_packedfile_blend_write(BlendWriter *writer, const PackedFile *pf)
{
  if (pf == nullptr) {
    return;
  }
  BLO_write_shared(writer, pf->data, pf->size, pf->sharing_info, [&]() {
    BLO_write_raw(writer, pf->size, pf->data);
  });
  BLO_write_struct(writer, PackedFile, pf);
}
 
void BKE_packedfile_blend_read(BlendDataReader *reader, PackedFile **pf_p, StringRefNull filepath)
{
  BLO_read_struct(reader, PackedFile, pf_p);
  PackedFile *pf = *pf_p;
  if (pf == nullptr) {
    return;
  }
  /* NOTE: this is endianness-sensitive. */
  /* NOTE: there is no way to handle endianness switch here. */
  pf->sharing_info = BLO_read_shared(reader, &pf->data, [&]() {
    BLO_read_data_address(reader, &pf->data);
    /* Do not create an implicit sharing if read data pointer is `nullptr`. */
    return pf->data ? blender::implicit_sharing::info_for_mem_free(const_cast<void *>(pf->data)) :
                      nullptr;
  });
  if (pf->data == nullptr) {
    /* We cannot allow a #PackedFile with a nullptr data field,
     * the whole code assumes this is not possible. See #70315. */
    CLOG_WARN(&LOG,
              "%s: nullptr packedfile data (source: '%s'), cleaning up...",
              __func__,
              filepath.c_str());
    BLI_assert(pf->sharing_info == nullptr);
    MEM_SAFE_FREE(*pf_p);
  }
}